Stone-boat.



M. J. QUINLAN. STONE BOAT.

APPLIOATION FILED DEC. 4, 1911.

1,03 ,959, 1 Patentd Sept. 17,1912.

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MICHAEL QUINLAN, OF BRISTOL, VERMONT.

STONE-BOAT.

Specification of LettersIPatent.

PatentedSept. 17, 1912.

Application filed December 4, 1911. Serial No. 663,854.

To all whom it may concern:

Be it known that I, MICHAEL J. Qumran, citizen of the United States,residing at Bristol, in the county of Addison and State of Vermont, haveinvented certain new and useful Improvements in Stone-Boats, of

which the following is a specification.

This invention relates to stone boats.

It is the object of the invention to produce a stone boat, theconstruction of which is such as to insure ease and cheapness, inmanufacture and strength and durability in use.

A further object is the provision of a stone boat, the body of which isformed of single pieces of plank steamed into shape and each planksecured in proper form by an angle plate having an upstanding wedgeadapted to enter the planks at the angles thereof.

Further objects and advantages will appear in the following description,it being understood that various changes in the form, proportion andminor details of construction may be resorted to within the scope of theappended claim.

For a full understanding of the invention and the merits thereof,reference is to be had to the following description and the accompanyingdrawings in which:

Figure 1 is a perspective view of the stone boat constructed inaccordance with this invention. Fig. 2 is a plan view of the bottomthereof. Fig. 3 is a longitudinal section on the line 33 of Fig. 2. Fig.a is a similar section of the unassembled parts.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingsby the same reference characters.

In obtaining the objects previously set forth, a plurality of planks A,preferably three in number, are first steamed and one end 6 of eachplank bent upwardly to form the bow of the stone boat. In order toinsure the retention of this desirable shape a preferably cast-ironplate 1 is used on each plank. This plate is formed of two leaves 2 and3 which meet to produce the interior dihedral angle 4 which conforms tothe exterior dihedral angle 5 of the plank. Within the interior angle 4:of the plate is a wedge-shaped portion 7 which extends across said plateand reinforces it at this point, this wedge being adapted to fit into acorrespondingly shaped'groove 8 extending across the face of the plankat the apex of the dihedral angle 5. It will here be noted that thiswedge prevents thereturn of the portion 6 to its normally straightposition. 011 each side of the groove 8 the plank is cut away to formrecesses 9 adapted to receive the leaves 2 and 3 and allow the casting lto set flush with the outer face of the plank, thereby offering a smoothsurface for contact with the ground when the device is in use. Eachplate is rigidly secured to the adjacent plank by fastening devicespreferably in the form of bolts 10 which pass through each leaf of theplate and through the adjacent plank. After each plank has been treatedin this manner they are all fastened together, preferably by transversecross pieces 11 bolted or otherwise secured to the planks at each end ofthe boat.

Attention is called to the fact that at the interior angle 4 each plankis provided with an angular casting which protects the wood at the pointsubjected to the most wear. The transverse wedge of said plate entersthe groove 8 and effectually prevents the portion 6 of each plank fromspring ing back toward its former straight position.

The advantages of this method of stone boat construction are obvious. Asteam bent plank may be used and the permanency of its shape secured foran indefinite period, whereas formerly the planks were sawed to shapeand great waste resulted. If steamed planks were employed, the roughusage to which the boat would naturally be subjected would cause thesteamed planks to straighten out and thus make necessary theirreshaping.

A stone boat constructed in accordance with this invention is light anddurable and obviates the objectionable features previously stated.Furthermore, having a separate plate for each plank makes replacementeasy should one of the plates become broken or worn. As a furtheradvantage in building the stone boat, the planks may be steamedseparately and each held in its proper form by the immediate applicationof the improved plate.

Although the plate has been described as being a separate attachment foreach plank,

its length could of course be extended to the Whole width of the boatand thereby strengthen the latter and further simplify the constructionof the device.

Having thus described and set forth the merits of this invention, it ishereby claimed.

In a stone boat, a plank having at one side a transversely disposedrecess, said plank being partially severed at a line between the edgesof the recess and having its end portions bent at an angle to each otherat the line where the plank is partially severed, and a plate insertedin the Copies of this patent may be obtained for five cents each, byaddressing the recess and having its outer surfaces approximately inalinement with the surfaces of the end portions of the plank, said platehaving a rib which fills the opening where the plank is partiallysevered.

In testimony whereof I aflix my signature in presence of two witnesses.

MICHAEL J. QUINLAN.

lVitnesses:

T. It. THonAs, E. G. ACOBS.

Commissioner of Patents,

Washington, D. G.

